mysql-keycloak-ds.xml

<?xml version="1.0" encoding="UTF-8"?>
<datasources xmlns="http://www.jboss.org/ironjacamar/schema">        
  <datasource jndi-name="java:jboss/datasources/KeycloakDS" pool-name="KeycloakDS" enabled="true" use-java-context="true">
    <connection-url>jdbc:mysql://${mysql.host}/keycloak_db</connection-url>
    <driver>mysql</driver>
    <security>
      <user-name>root</user-name>
      <password>mysecretpassword</password>
    </security>
  </datasource>
</datasources>